Top Drive Post Jarring Checks Bulletin

2003 Varco LP All Rights Reserved TDS-93-1Rev A

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Date: May 14, 2003Subject: Post Jarring Inspection of Top Drives

Product: Top Drive Drilling System

AffectedAssemblies: All TDS Models

Objective: To Update the Post Jarring Checklist

Problem: Jarring is a procedure that occurs on all drilling rigs. While it is not practical to recommend that the Top Drive be removed from the string during jarring operations, it is imperative that Top Drive users exercise care and caution when using a Top Drive after a jarring operation.

Solution: Safe operation of the Top Drive is clearly the responsibility of the user and the rig crew. In an effort to assist the user, we have prepared a “Post Jarring Checklist” which was originally issued in 1993.

This checklist was prepared after considerable consultation with users, our field service personnel and our engineering design staff. While the checklist is our recommendation, your inspection should not be limited to thischecklist. With the advent of many new Varco Top Drive products since the original release, it has become imperative that we update this checklist.

Our design, manufacturing and quality control procedures are designed to provide the drilling industry with safe and reliable tools. We aggressively pursue improvements in the design and manufacture of our equipment and continually seek input from Top Drive users as a crucial component of that process.

Product Bulletin No.: 93-1Rev A

Release Top Drive Drilling System


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While we believe this Post Jarring Checklist is a useful tool, we welcome your comments so that we may improve it over time. We have organized this checklist by major sub-assembly. The checklist draws the inspector’s attention to specific parts. The inspection process should be rigorous,looking for any damage or wear that may pose a safety or operational risk.

The possibility of damage to a Top Drive during a jarring operation isconsiderable. If prolonged jarring that may affect Top Drive components is anticipated, the user should consider removing the Top Drive from the drill string.

Please contact your local Varco Service Center or if you have any questions regarding this product bulletin.


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POST JARRING CHECKLIST

DESIGNATION / ITEM OK or NA COMMENTS

ElevatorsLink Block Bolt Assemblies Secured _____Hinge Pin retainer in Place _____Latch Pin Retainer in Place _____

Pipe HandlerGuard Pin Secured _____Bell Guide Bolts Secured (same as stabbing guide) _____Hinge pin Retainer Bolts Inspect _____Die Retainer Bolts Secured _____Jaw Retaining Bolts Tight _____Torque Wrench Mounting Bolts Secured _____Bolts On Die Spring Covers Secured _____Pins for Die Springs Secured _____Lift Cylinder Pins Secured _____Torque Cylinders/Torque Tube Secured _____Hanger Nuts for IBOP Cylinders Secured _____Hanger Pin for Pipe Handler/Rotating Head Secured _____Fasteners for Stabbing Guide (PH-50/75/100) _____Pins/Cotter Pins for Lift Cylinder Stop Tubes _____Bolts on Torque Backup Clamp Assemblies _____Fasteners- Clamp Clevis to Clamp Cylinder Piston(PH-85) _____Torque Cylinder Rod Gland Retaining Screws(PH-85) _____Hinge Pins/Fasteners on PH-50 Clamp Cylinder Assy _____Clevis/Cotter Pins on Elevator Link Clamps (PH-60/85) _____Locking Rod on Rotating Head Locking Handle(PH-60/85/100) _____Outer Collar/Fasteners on PH-60 _____Crank Pin (PH-50/75 Pipe Handlers only) _____

IBOP ActuatorBolts for Crank Assembly Secured _____Roller Assembly Bolts Secured _____Actuator Arm Pins Secured _____


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Dolly/Carriage AssemblyBolts for Dolly Roller Brackets Secured _____Bolts for Service Loop Clamp Bars Secured _____Bolts for S/Pipe Clamp Secured _____Bolts for Swivel Link Retainer Plates Secured _____Quill Housing Trunion Cap Bolts Secured _____Swing Bolt Pins/Nuts _____Side Pads Secured _____Cam Follower End Cap Fasteners (where applicable) _____TDS-10/11HP Wear Pads _____Cylinder Attachment Points _____Cracks on Welded Stop Plates/Stop Brackets _____(Retract Dollies)Loose Fasteners on Bolted Plates/Stop Brackets _____(Retract Dollies)

Motor Housing/Quill AssemblyJunction Box Mounting Bolts Secured _____Inspect Junction Box Feet _____Blower Motor Mounting Feet Bolts Secured _____Blower Motor Fan Shroud and Rain Shield Bolts Secured with Lockwire _____Instrument Covers and Mounting Feet Securedand Lock-wired _____Accumulator Retaining Clamp Bolts Secured and Lockwired _____Heat Exchanger Mounting Bolts Secured _____Counterbalance Cylinder Pins Secured _____Counterbalance Shackles Secured _____Motor Armature Position (TDS-3/4/5/6/8) _____TDS Lower Gear case to Main Body _____TDS Pressure Filter Bowl _____Retighten Washpipe Packing Box and Holding Nut _____Verify Shaft Liner Assembly is seated (IDS only) _____AC Auxiliary Motor Mounting Feet/Bolts areSecured/Not Damaged _____

Torque ArrestorsAll Bolts for Solid Body Elevator Plate Secured _____Torque Arrestors/Mounting Pins at Rotating HeadSecured _____Bolts for Solid Body Elevator Wear Guide Securedand Lock-wired _____


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Link TiltShackle Secured _____Mounting Bolts Secured to Solid Body Elevator _____Check Mounting Feet on Link Tilt Frame _____Stop Adjustment Pins or Lock Nuts Secured _____Pivot Pin and Cotter Pins Secured _____Cable Assembly for Intermediate Stop _____Link Tilt Pin (PH-50) _____Upper/Lower Retaining Bolts (PH-85 with Hydraulic Link Tilt) _____Link Tilt Linkage Pins secured w/cotter pins andslotted nuts(PH-50, 55, 75 & 100) _____Link Tilt Cylinder Rod and Clevis Pins secured with cotter pins and slotted nuts (PH-50, 55,75 & 100) _____Link Tilt Stop Adjustment Bolt secured with lockwire (PH-50, 55, 75 & 100) _____Elevator Link Attachment Clamp U-Bolt Nuts Secured _____

Gear BoxAlignment Cylinder Pins Secured _____Auto Return Cylinder Pins Secured _____Powered Rotating Link Adapter Motor/Shot Pin Assy Bolts Secured and Lockwired (TDS-8/9/10/11 and PH-85 w/Hyd Rot Head) _____

Cooling SystemExtended Intake Inlet Mounting Bolts _____Remote Blower Snorkel Tube Saddle Bolts _____

Main ShaftCheck Exposed Shaft Area for Damage _____Shaft End Play _____Landing Collar Retainer Tabs/Bolts _____

Service LoopsService Loop Attachment Points _____Service Loop Supports/D-Rings _____Service Loop Connecting Links _____

Manifold AssembliesSolenoid Valves and Wiring Intact _____

Guide Beam Assemblies (IDS, TDS-9/10/11)Hinge Pins Secured _____Lower Tie Back Attachment Hardware Secured _____

Documents

Top Drive Post Jarring Checks Bulletin